EXERCISE 7.1 1. Which of the following numbers are not perfect cubes?
(1) 216
(ü) 128
(i) 1000
(v) 46656
(iv) 100

216

Step-by-step explanation:

factors 216 and take common from them you can find

You see this is a tricky question but its not that hard if you put your mind to it, but 128 and 100 aren't perfect cubes.

a) one student is chosen from classroom a, then a student is chosen from classroom b.  

step-by-step explanation:

independent events are ones in which the probability of one event does not affect the probability of the second event.

one student is chosen from classroom a; this does not affect the chances of choosing a student from classroom b.   this makes these independent events.

when one card is chosen from a standard deck and then set aside before a second card is chosen, the probability of the second card being chosen changes.   this makes them dependent events.

when one student is chosen from classroom a and then a second student is chosen from classroom a, the probability of choosing the second student changes.   this makes them dependent events.

when a letter is chosen from the alphabet and then a second letter is chosen, the probability of choosing the second letter changes.   this makes them dependent events.

attachment?

step-by-step explanation: